Abstract
The influences of the modification of turbulent coherent structures on temperature field and heat transfer in turbulent channel flow are studied using large eddy simulation (LES) of compressible turbulent channel flows with spanwise wall oscillation (SWO). The reliability of the LES on such problems is proved by the comparisons of the drag reduction data with those of other researches. The high consistency of coherent velocity structures and temperature structures is found based on the analyses of the turbulent flow field. When the coherent velocity structures are suppressed, the transportations of momentum and heat are reduced simultaneously, demonstrating the same trend. This shows that the turbulent coherent structures have the same effects on the transportations of momentum and heat. The averaged wall heat flux can be reduced with appropriate oscillating parameters.
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Supported by the Key Subjects of National Natural Science Foundation of China (Grant No. 10732090), the National Natural Science Foundation of China (Grant No. 50476004), and the 111 Project (Grant No. B08009)
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Fang, J., Lu, L. & Shao, L. Large eddy simulation of compressible turbulent channel flow with spanwise wall oscillation. Sci. China Ser. G-Phys. Mech. Astron. 52, 1233–1243 (2009). https://doi.org/10.1007/s11433-009-0165-3
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DOI: https://doi.org/10.1007/s11433-009-0165-3